EP 2705075 A1 20140312 - METHOD FOR THE PRODUCTION OF WATER-ABSORBING POLYMER PARTICLES
Title (en)
METHOD FOR THE PRODUCTION OF WATER-ABSORBING POLYMER PARTICLES
Title (de)
VERFAHREN ZUR HERSTELLUNG WASSERABSORBIERENDER POLYMERPARTIKEL
Title (fr)
PROCÉDÉ DE PRODUCTION DE PARTICULES POLYMÈRES ABSORBANT L'EAU
Publication
Application
Priority
- EP 11165153 A 20110506
- EP 2012058112 W 20120503
- EP 12718660 A 20120503
Abstract (en)
[origin: WO2012152647A1] The invention relates to a method for producing water-absorbing polymer particles, comprising the steps of polymerizing a monomer solution or suspension, drying the obtained polymer gel, and grinding and classifying the dried polymer gel, wherein the grinding is carried out by means of a multi-stage roller mill, the first grinding gap has a width of 500 to 5,000 µm, the product mass flow passing through the first grinding gap is guided to the second grinding gap by means of a magnetic separator, and the second grinding gap has a smaller gap width than the first grinding gap.
IPC 8 full level
C08J 3/12 (2006.01); A61L 15/24 (2006.01); A61L 15/60 (2006.01); C08F 6/28 (2006.01); C08F 220/06 (2006.01)
CPC (source: EP)
A61L 15/60 (2013.01); C08F 6/28 (2013.01); C08F 220/06 (2013.01); C08J 3/12 (2013.01); C08J 3/128 (2013.01); C08J 2300/14 (2013.01); C08J 2333/00 (2013.01)
Citation (search report)
See references of WO 2012152647A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012152647 A1 20121115; CN 103502324 A 20140108; CN 103502324 B 20151223; EP 2705075 A1 20140312; EP 2705075 B1 20161221; JP 2014513190 A 20140529; JP 6073292 B2 20170201
DOCDB simple family (application)
EP 2012058112 W 20120503; CN 201280021685 A 20120503; EP 12718660 A 20120503; JP 2014509676 A 20120503